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FaqI receive an installation error when installing the component, what could be the problem?

I receive an installation error when installing the component, what could be the problem?

Created on:Monday, 30 June 2014 16:51

Installation error are usually not due to the component itself.

In most of the cases when you receive an installation errors there is a problem on your server or Joomla configuration. Usually wrong folder permissions prevent extensions to be installed and copied correctly by the Joomla installer, moreover the folder that is used by Joomla to install extensions, by default named 'tmp', often is set as not writable.

Check your Joomla global configuration for the 'tmp' path and under 'System Information'->'Directory permissions' ensure that the folder is writable in green color, if it looks in red as unwritable you can't install any extensions on your Joomla! website.

Tip: to be sure that the installer issue is not limited to JSitemap, try to install other extensions checking if the same problem occurs. If you are able to install other extensions, ensure that the package that you are installing is marked following the Joomla version you are running.

If you receive an SQL error of type 'Duplicate column name 'meta_image' SQL=-- Exceptions queries...' the problem could be related to some plugin duplicating SQL queries execution during the installation of extensions. Check if you have installed a plugin named 'System - MightySites' and in such case unpublish it temporary before installing the component. In other cases if you have restored the Joomla database from a backup or site migration the problem could be a partial installation still going on, so to fix the issue delete the table named 'xxx_jmap_metainfo'

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